the mile high city will host the first presidential debate this evening. mitt romney has been preparing for the debates in denver the past few days. president obama has been preching in neff. both have been keeping low profiles in recent days. meanwhile republicans are seizing on comments vice president joe biden made at a campaign stop yesterday to say the obama administration's economic policies are not working. >> how they can justify raising taxes on the middle class that's been buried the last four years. >> of course the middle class has been buried. they're being bear ruried by regulations, taxes, borrowing. they're being buried by the obama administration's economic failures. >> biden later tried to clarify his comment by saying the middle class was buried by policies mitt romney and paul ryan supported. >>> and mitt romney's campaign has called tonight's debate a restart of the campaign. right now the republican nominee trails by 3% among likely voters. that is according to the latest nbc news/"wall street journal" poll. that is also within the po